<template>
  <li
   @mouseenter="isEnter = true"
    @mouseleave="isEnter = false"
    :class="{active:isEnter}"
    >
    <label  >

        <input type="checkbox" :checked="done">
        <span>{{ todo }}</span>
    </label>
    <button class="btn btn-danger" 
    :style="{display:isEnter?'block':'none'}">删除</button>
  </li>
</template>

<script>
export default {
name:"Item",
props:["id","todo","done"],
data(){
  return{
    isEnter:false
  }
},

}
</script>

<style>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}

li:last-child {
  border-bottom: none;
}

li.active {
  background: #ccc;
}

li.active button {
  display: block;
}
</style>